how do you solve 2/3b - 3 = 15?

I was told the answer is -18, but not sure how to get there...please help

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  • 1 decade ago
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    Q: 2/3b + 3 =15

    Ans:

    2/3b=15-3

    (2/3)b=12

    b=12*(3/2)

    b=18

  • 1 decade ago

    You are solving for b right?

    (2/3)b - 3 = 15

    Bring the 3 to the right by adding 3 to both sides:

    (2/3)b = 18

    Bring the 3 in the denominator to the right by multiplying 3 to both sides:

    2b = 54

    Bring the 2 to the right by dividing 2 by both sides:

    b = 27

    So the answer should be 27... unless the question is actually -15 instead of +15, THEN b would be -18.

  • Anonymous
    1 decade ago

    The answer is definitely not -18 since:

    2/3b - 3 = 15

    Shifting -3 to the RHS

    2/3b = 15 + 3

    Bringing (15+3) to LHS and 3b to RHS

    2/18 = 3b

    b = 0.037

  • 1 decade ago

    2/3b - 3 = 15 (take -3 to other side, and negative becomes positive so add to 15)

    2/3b = 18

    therefore b = 3/2 x 18 = 27

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  • 1 decade ago

    2/3b-3=15

    2/3b =15+3

    2/3b=18

    2/3 divided by 2/3b = 18 divided by 2/3

    b=27

  • 1 decade ago

    2/3b - 3 = 15

    Solution:

    2/3b = 15 + 3

    2/3b = 18

    2 = (3b)(18)

    2 = 54b

    b = 1/27

    If it is (2/3)b - 3 = 15

    Solution:

    (2/3)b = 15 + 3

    (2/3)b = 18

    b = 18 (3/2)

    b = 27

  • Anonymous
    1 decade ago

    2/3b - 3 = 15

    2/3b = 15+ 3

    2b = 18*3

    b = 54/2

    b = 27

    as you see -18 is horribly wrong. also 2/3b = (2b)/3

  • 1 decade ago

    2/3b - 3 = 15

    2/3b = 18

    2b = 54

    b = 27

    lol

  • 1 decade ago

    2/3(b) - 3 = 15

    2b/3 - 3 = 15

    2b/3 = 15 + 3

    2b = 3(18)

    2b = 54

    b = 54/2

    b = 27

  • 1 decade ago

    Look how many people are willing to do your homework. You were told the answer and the process. Why do we pay teachers? :-)

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